En Español

Q. Who is Mr. Smarty Plants?

A: There are those who suspect Wildflower Center volunteers are the culpable and capable culprits. Yet, others think staff members play some, albeit small, role. You can torture us with your plant questions, but we will never reveal the Green Guru's secret identity.

Help us grow by giving to the Plant Database Fund or by becoming a member

Did you know you can access the Native Plant Information Network with your web-enabled smartphone?

Share

Ask Mr. Smarty Plants

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
    
 
See a list of all Smarty Plants questions

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

Need help with plant identification, visit the plant identification page.

 
rate this answer
Not Yet Rated

Wednesday - June 24, 2009

From: SAN ANTONIO, TX
Region: Southwest
Topic: Diseases and Disorders
Title: Why are my Spanish Oaks dropping branches that appear to be alive?
Answered by: Jimmy Mills

QUESTION:

We have two large Spanish Oaks that we planted ourselves. They both have begun to loose large branches that aren't dead. These branches just break off and fall. There is usually a wind, but not to the extent that limbs should fall off the trees. Is this a problem with these trees? Can we do anything to prevent it?

ANSWER:

This doesn't sound like a problem of the Spanish Oaks so much as it sounds like the oaks have some unwanted guests; twig girdlers. These are a type  of wood boring longhorn beetles that girdle twigs and branches and cause them to fall from the tree. Common hosts of the twig girdler include persimmon, pecan, elm, hickory, oak, honeylocust, hackberry, poplar, linden, redbud, basswood, dogwood and various fruit trees.

This Bulletin from the Texas Agricultural Extension Service describes the biology of the girdlers.

Have you examined the ends of the fallen branches? There should be some tell-tale signs if the beetles are the cause.

This article from the Alabama Agricultural Experinent Station has good illustrations of beetle damage.

My suggestion is that you get in touch with the Texas AgriLife Extension Office in Bexar County, and show them the branches. They should be able to help you with this problem by identifying the culprit and suggesting treatment.

 

 

More Diseases and Disorders Questions

Fungus Spots on Native Bush Honeysuckle
December 03, 2010 - My native bush honeysuckle plants that I have along my back fence have leaves that are turning yellow with spots. It appears to be a type of fungus, but not powdery mildew. Any suggestions as to what ...
view the full question and answer

Problems with spreading juniper in Sturgis, SD
May 25, 2011 - I live in Sturgis, South Dakota and I have two different varieties of Spreading Juniper in the yard as ground cover. They have developed an orange colored fungus that goes dormant in the winter but a...
view the full question and answer

Problems with red oak from Austin
July 31, 2013 - I planted 3 Texas Red Oaks several years ago. The trees are in a tight cluster just a few feet apart. At the end of last summer, one of them began to develop brown spots and yellowed leaves. This summ...
view the full question and answer

Damage to Pine Tree on Cape Cod, MA
June 11, 2013 - My pine tree on Cape Cod has bark that is perforated with holes covering the entire tree. Bark can be removed by hand. Looks dead. What did this?
view the full question and answer

Unknown ailment of Turk's cap in northeast Texas
July 01, 2013 - I just moved from the Dallas area to Emory in the north east part. I brought two young Turk's cap plants in pots. I had to leave the mother plant behind. The tops have a very curled and shrunken a...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | JOBS | SITEMAP | STAFF INTRANET
© 2016 Lady Bird Johnson Wildflower Center